| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>. |
| * All rights reserved. |
| */ |
| |
| #ifndef _SYS_FS_ZFS_VFSOPS_H |
| #define _SYS_FS_ZFS_VFSOPS_H |
| |
| #if __FreeBSD_version >= 1300125 |
| #define TEARDOWN_RMS |
| #endif |
| |
| #if __FreeBSD_version >= 1300109 |
| #define TEARDOWN_INACTIVE_RMS |
| #endif |
| |
| #include <sys/dataset_kstats.h> |
| #include <sys/list.h> |
| #include <sys/vfs.h> |
| #include <sys/zil.h> |
| #include <sys/sa.h> |
| #include <sys/rrwlock.h> |
| #ifdef TEARDOWN_INACTIVE_RMS |
| #include <sys/rmlock.h> |
| #endif |
| #include <sys/zfs_ioctl.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #ifdef TEARDOWN_RMS |
| typedef struct rmslock zfs_teardown_lock_t; |
| #else |
| #define zfs_teardown_lock_t rrmlock_t |
| #endif |
| |
| #ifdef TEARDOWN_INACTIVE_RMS |
| typedef struct rmslock zfs_teardown_inactive_lock_t; |
| #else |
| #define zfs_teardown_inactive_lock_t krwlock_t |
| #endif |
| |
| typedef struct zfsvfs zfsvfs_t; |
| struct znode; |
| |
| struct zfsvfs { |
| vfs_t *z_vfs; /* generic fs struct */ |
| zfsvfs_t *z_parent; /* parent fs */ |
| objset_t *z_os; /* objset reference */ |
| uint64_t z_flags; /* super_block flags */ |
| uint64_t z_root; /* id of root znode */ |
| uint64_t z_unlinkedobj; /* id of unlinked zapobj */ |
| uint64_t z_max_blksz; /* maximum block size for files */ |
| uint64_t z_fuid_obj; /* fuid table object number */ |
| uint64_t z_fuid_size; /* fuid table size */ |
| avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ |
| avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ |
| krwlock_t z_fuid_lock; /* fuid lock */ |
| boolean_t z_fuid_loaded; /* fuid tables are loaded */ |
| boolean_t z_fuid_dirty; /* need to sync fuid table ? */ |
| struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ |
| zilog_t *z_log; /* intent log pointer */ |
| uint_t z_acl_type; /* type of acl usable on this fs */ |
| uint_t z_acl_mode; /* acl chmod/mode behavior */ |
| uint_t z_acl_inherit; /* acl inheritance behavior */ |
| zfs_case_t z_case; /* case-sense */ |
| boolean_t z_utf8; /* utf8-only */ |
| int z_norm; /* normalization flags */ |
| boolean_t z_atime; /* enable atimes mount option */ |
| boolean_t z_unmounted; /* unmounted */ |
| zfs_teardown_lock_t z_teardown_lock; |
| zfs_teardown_inactive_lock_t z_teardown_inactive_lock; |
| list_t z_all_znodes; /* all vnodes in the fs */ |
| uint64_t z_nr_znodes; /* number of znodes in the fs */ |
| kmutex_t z_znodes_lock; /* lock for z_all_znodes */ |
| struct zfsctl_root *z_ctldir; /* .zfs directory pointer */ |
| boolean_t z_show_ctldir; /* expose .zfs in the root dir */ |
| boolean_t z_issnap; /* true if this is a snapshot */ |
| boolean_t z_vscan; /* virus scan on/off */ |
| boolean_t z_use_fuids; /* version allows fuids */ |
| boolean_t z_replay; /* set during ZIL replay */ |
| boolean_t z_use_sa; /* version allow system attributes */ |
| boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */ |
| boolean_t z_use_namecache; /* make use of FreeBSD name cache */ |
| uint8_t z_xattr; /* xattr type in use */ |
| uint64_t z_version; /* ZPL version */ |
| uint64_t z_shares_dir; /* hidden shares dir */ |
| dataset_kstats_t z_kstat; /* fs kstats */ |
| kmutex_t z_lock; |
| uint64_t z_userquota_obj; |
| uint64_t z_groupquota_obj; |
| uint64_t z_userobjquota_obj; |
| uint64_t z_groupobjquota_obj; |
| uint64_t z_projectquota_obj; |
| uint64_t z_projectobjquota_obj; |
| uint64_t z_replay_eof; /* New end of file - replay only */ |
| sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ |
| #define ZFS_OBJ_MTX_SZ 64 |
| kmutex_t z_hold_mtx[ZFS_OBJ_MTX_SZ]; /* znode hold locks */ |
| struct task z_unlinked_drain_task; |
| }; |
| |
| #ifdef TEARDOWN_RMS |
| #define ZFS_TEARDOWN_INIT(zfsvfs) \ |
| rms_init(&(zfsvfs)->z_teardown_lock, "zfs teardown") |
| |
| #define ZFS_TEARDOWN_DESTROY(zfsvfs) \ |
| rms_destroy(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \ |
| rms_try_rlock(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \ |
| rms_rlock(&(zfsvfs)->z_teardown_lock); |
| |
| #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \ |
| rms_runlock(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \ |
| rms_wlock(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \ |
| rms_wunlock(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \ |
| rms_unlock(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \ |
| rms_rowned(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \ |
| rms_wowned(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_HELD(zfsvfs) \ |
| rms_owned_any(&(zfsvfs)->z_teardown_lock) |
| #else |
| #define ZFS_TEARDOWN_INIT(zfsvfs) \ |
| rrm_init(&(zfsvfs)->z_teardown_lock, B_FALSE) |
| |
| #define ZFS_TEARDOWN_DESTROY(zfsvfs) \ |
| rrm_destroy(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_TRY_ENTER_READ(zfsvfs) \ |
| rw_tryenter(&(zfsvfs)->z_teardown_lock, RW_READER) |
| |
| #define ZFS_TEARDOWN_ENTER_READ(zfsvfs, tag) \ |
| rrm_enter_read(&(zfsvfs)->z_teardown_lock, tag); |
| |
| #define ZFS_TEARDOWN_EXIT_READ(zfsvfs, tag) \ |
| rrm_exit(&(zfsvfs)->z_teardown_lock, tag) |
| |
| #define ZFS_TEARDOWN_ENTER_WRITE(zfsvfs, tag) \ |
| rrm_enter(&(zfsvfs)->z_teardown_lock, RW_WRITER, tag) |
| |
| #define ZFS_TEARDOWN_EXIT_WRITE(zfsvfs) \ |
| rrm_exit(&(zfsvfs)->z_teardown_lock, tag) |
| |
| #define ZFS_TEARDOWN_EXIT(zfsvfs, tag) \ |
| rrm_exit(&(zfsvfs)->z_teardown_lock, tag) |
| |
| #define ZFS_TEARDOWN_READ_HELD(zfsvfs) \ |
| RRM_READ_HELD(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_WRITE_HELD(zfsvfs) \ |
| RRM_WRITE_HELD(&(zfsvfs)->z_teardown_lock) |
| |
| #define ZFS_TEARDOWN_HELD(zfsvfs) \ |
| RRM_LOCK_HELD(&(zfsvfs)->z_teardown_lock) |
| #endif |
| |
| #ifdef TEARDOWN_INACTIVE_RMS |
| #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \ |
| rms_init(&(zfsvfs)->z_teardown_inactive_lock, "zfs teardown inactive") |
| |
| #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \ |
| rms_destroy(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \ |
| rms_try_rlock(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \ |
| rms_rlock(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \ |
| rms_runlock(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \ |
| rms_wlock(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \ |
| rms_wunlock(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \ |
| rms_wowned(&(zfsvfs)->z_teardown_inactive_lock) |
| #else |
| #define ZFS_TEARDOWN_INACTIVE_INIT(zfsvfs) \ |
| rw_init(&(zfsvfs)->z_teardown_inactive_lock, NULL, RW_DEFAULT, NULL) |
| |
| #define ZFS_TEARDOWN_INACTIVE_DESTROY(zfsvfs) \ |
| rw_destroy(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_TRY_ENTER_READ(zfsvfs) \ |
| rw_tryenter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER) |
| |
| #define ZFS_TEARDOWN_INACTIVE_ENTER_READ(zfsvfs) \ |
| rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_READER) |
| |
| #define ZFS_TEARDOWN_INACTIVE_EXIT_READ(zfsvfs) \ |
| rw_exit(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_ENTER_WRITE(zfsvfs) \ |
| rw_enter(&(zfsvfs)->z_teardown_inactive_lock, RW_WRITER) |
| |
| #define ZFS_TEARDOWN_INACTIVE_EXIT_WRITE(zfsvfs) \ |
| rw_exit(&(zfsvfs)->z_teardown_inactive_lock) |
| |
| #define ZFS_TEARDOWN_INACTIVE_WRITE_HELD(zfsvfs) \ |
| RW_WRITE_HELD(&(zfsvfs)->z_teardown_inactive_lock) |
| #endif |
| |
| #define ZSB_XATTR 0x0001 /* Enable user xattrs */ |
| /* |
| * Normal filesystems (those not under .zfs/snapshot) have a total |
| * file ID size limited to 12 bytes (including the length field) due to |
| * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical |
| * reasons, this same limit is being imposed by the Solaris NFSv3 implementation |
| * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It |
| * is not possible to expand beyond 12 bytes without abandoning support |
| * of NFSv2. |
| * |
| * For normal filesystems, we partition up the available space as follows: |
| * 2 bytes fid length (required) |
| * 6 bytes object number (48 bits) |
| * 4 bytes generation number (32 bits) |
| * |
| * We reserve only 48 bits for the object number, as this is the limit |
| * currently defined and imposed by the DMU. |
| */ |
| typedef struct zfid_short { |
| uint16_t zf_len; |
| uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ |
| uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ |
| } zfid_short_t; |
| |
| /* |
| * Filesystems under .zfs/snapshot have a total file ID size of 22[*] bytes |
| * (including the length field). This makes files under .zfs/snapshot |
| * accessible by NFSv3 and NFSv4, but not NFSv2. |
| * |
| * For files under .zfs/snapshot, we partition up the available space |
| * as follows: |
| * 2 bytes fid length (required) |
| * 6 bytes object number (48 bits) |
| * 4 bytes generation number (32 bits) |
| * 6 bytes objset id (48 bits) |
| * 4 bytes[**] currently just zero (32 bits) |
| * |
| * We reserve only 48 bits for the object number and objset id, as these are |
| * the limits currently defined and imposed by the DMU. |
| * |
| * [*] 20 bytes on FreeBSD to fit into the size of struct fid. |
| * [**] 2 bytes on FreeBSD for the above reason. |
| */ |
| typedef struct zfid_long { |
| zfid_short_t z_fid; |
| uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ |
| uint8_t zf_setgen[2]; /* gen[i] = gen >> (8 * i) */ |
| } zfid_long_t; |
| |
| #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) |
| #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) |
| |
| extern uint_t zfs_fsyncer_key; |
| extern int zfs_super_owner; |
| |
| extern void zfs_init(void); |
| extern void zfs_fini(void); |
| |
| extern int zfs_suspend_fs(zfsvfs_t *zfsvfs); |
| extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); |
| extern int zfs_end_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); |
| extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers); |
| extern int zfsvfs_create(const char *name, boolean_t readonly, zfsvfs_t **zfvp); |
| extern int zfsvfs_create_impl(zfsvfs_t **zfvp, zfsvfs_t *zfsvfs, objset_t *os); |
| extern void zfsvfs_free(zfsvfs_t *zfsvfs); |
| extern int zfs_check_global_label(const char *dsname, const char *hexsl); |
| extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs); |
| extern int zfs_get_temporary_prop(struct dsl_dataset *ds, zfs_prop_t zfs_prop, |
| uint64_t *val, char *setpoint); |
| extern int zfs_busy(void); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _SYS_FS_ZFS_VFSOPS_H */ |